Which sentence uses the proper APA source citation to avoid plagiarism?

A. It is believed that elephants communicate with each other by low-pitched calls that humans cannot hear (Ray Jarslowitz, 1956, pg.521).

B. It is believed that elephants communicate with each other by low-pitched calls that humans cannot hear (Jarslowitz, pg. 521).

C. It is believed that elephants communicate with each other by low-pitched calls that humans cannot hear (Jarslowitz, 1956).

D. It is believed that elephants communicate with each other by low-pitched calls that humans cannot hear (Ray Jarslowitz, 1956).